Roll sealing equipment for sealing films has sealing roll and swiveling heating roll onto which pressure is applied normal to their contact line by servomotor driving spindle and nut linked to linear guide supporting heating roll

摘要

Films are sealed between a sealing roll(6) and a heating roll(1), movement of the latter towards the former being produced through a linear guide(2). Pressure is exerted on the heating roll by a drive system(8,8.1,8.2) acting through the linear guide, the pressure being directed normal to the line contact between both rolls. A swiveling bearing between the heating roll(1) and the linear guide(2) compensates for small movements of the heating roll about an imaginary axis(7) between both rolls(1,6) and comprises a circular arc guide(4) and/or one or more bearing rollers(5). A central bearing roller(5) engages with one side of the guide and two further bearing rollers engage with the opposite side. Bearing rollers(5) are mounted in a housing onto which pressure is applied by a servomotor(8) which rotates a spindle(8.1) pressing a nut(8.2) onto a spring. The spring is connected to the linear guide and forms a cardan type joint relative to the nut.